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explain in detail about crash recovery
What is the use of group by clause? Group by clause is used to apply aggregate functions to a set of tuples. The attributes given in the group by clause are used to
What is a cascading update? Referential integrity constraints needs that foreign key values in one table correspond to primary key values in another. If the value of the primar
case study
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
what are the purposes of dbms in details
why older data models are being replaced by new data models.
Cardinality shows the number of instances of an entity associated with another entity participating in a relationship. Depend on the cardinality binary relationship can be further
You are required to write a report which evaluates two of the following issues in relation to your case study database: a. Security issues b. Performance issues c. Backup
assignment
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